From nobody Sat Feb 7 06:20:54 2026 Received: from mailout2.samsung.com (mailout2.samsung.com [203.254.224.25]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4409A21CC55 for ; Fri, 26 Dec 2025 04:28:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=203.254.224.25 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766723317; cv=none; b=gKSXUZfTyvxSlu2HQevbc3k8yJdcr7g5wRZhgHyuJvxmOsny6d5WtVM6t8SU8rxOpIsMiNYDSSAL2856QH2tE9gA325JIPoqtuzAork/1med+Xj0LkQmjZ4iTg+uoUx5LtW1JCzBQz+nS65hQFtAuYLQGIRmK83WH9RQEM8S4xo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766723317; c=relaxed/simple; bh=+tp0gEPz03QFeRezzYlj3p1rjgo3WEDCN4pO99wTDwM=; h=Mime-Version:Subject:From:To:CC:Message-ID:Date:Content-Type: References; b=YmV0WxNK+M67kxKi/qtbpCJeti/TGUWW/IRisn+SzoQmxh1ZqMHq6FNQgHmSCagwt3vTs2C1Y4R4t6NYwjy6+qoS2P7spTtJf5+FIn1VYNZeqEPU37vk2jTCiq/rm6T0TAm/tGV1fKpY+RMl1CY4TpR61LkJT7NURWWstZoz7wc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=samsung.com; spf=pass smtp.mailfrom=samsung.com; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b=Vr8fPAbH; arc=none smtp.client-ip=203.254.224.25 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=samsung.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=samsung.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="Vr8fPAbH" Received: from epcas2p3.samsung.com (unknown [182.195.41.55]) by mailout2.samsung.com (KnoxPortal) with ESMTP id 20251226042826epoutp0282e90157f739640761951286a38bd8a5~EqXyXBYlC1753417534epoutp02O for ; Fri, 26 Dec 2025 04:28:26 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout2.samsung.com 20251226042826epoutp0282e90157f739640761951286a38bd8a5~EqXyXBYlC1753417534epoutp02O DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1766723306; bh=dg5bdLxpRj2vclq+WxQF56vM7e2akIt77jtRkyJ6xRA=; h=Subject:Reply-To:From:To:CC:Date:References:From; b=Vr8fPAbHH+/j5DbxsNg47acHX3zYQsopV3G1e40jBcnyUsoVXP9SJU5ExanGrOnWY +gL2nEWkPS8iU3MFBa0Gr/D+3wu0IyUOGsYj84cWRC5RxQDS6rpvahWOtzZBgsSkZ9 RbQhlCSctiKPK0tSUbNppaVl//8ZWlcZJsBYux/s= Received: from epsnrtp02.localdomain (unknown [182.195.42.154]) by epcas2p4.samsung.com (KnoxPortal) with ESMTPS id 20251226042825epcas2p4eea46355325d7ae585407ede7c6259ae~EqXx49-PI0326503265epcas2p4M; Fri, 26 Dec 2025 04:28:25 +0000 (GMT) Received: from epcas2p1.samsung.com (unknown [182.195.38.200]) by epsnrtp02.localdomain (Postfix) with ESMTP id 4dct0947vqz2SSKZ; Fri, 26 Dec 2025 04:28:25 +0000 (GMT) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Subject: [PATCH] scsi: ufs: core: Handle sentinel value for dHIDAvailableSize Reply-To: keosung.park@samsung.com Sender: Keoseong Park From: Keoseong Park To: ALIM AKHTAR , "avri.altman@wdc.com" , "bvanassche@acm.org" , "James.Bottomley@HansenPartnership.com" , "martin.petersen@oracle.com" , "peter.wang@mediatek.com" , "tanghuan@vivo.com" , Keoseong Park , "zhongqiu.han@oss.qualcomm.com" , "quic_nguyenb@quicinc.com" , "liu.song13@zte.com.cn" , "chullee@google.com" CC: "linux-scsi@vger.kernel.org" , "linux-kernel@vger.kernel.org" X-Priority: 3 X-Content-Kind-Code: NORMAL X-CPGS-Detection: blocking_info_exchange X-Drm-Type: N,general X-Msg-Generator: Mail X-Msg-Type: PERSONAL X-Reply-Demand: N Message-ID: <20251226042825epcms2p6f02ba12fa97ff4a69c00f6fb9ff55603@epcms2p6> Date: Fri, 26 Dec 2025 13:28:25 +0900 X-CMS-MailID: 20251226042825epcms2p6f02ba12fa97ff4a69c00f6fb9ff55603 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" X-Sendblock-Type: AUTO_CONFIDENTIAL CMS-TYPE: 102P X-CPGSPASS: Y X-CPGSPASS: Y cpgsPolicy: CPGSC10-223,Y X-CFilter-Loop: Reflected X-CMS-RootMailID: 20251226042825epcms2p6f02ba12fa97ff4a69c00f6fb9ff55603 References: JEDEC UFS spec defines 0xFFFFFFFF for dHIDAvailableSize as indicating no valid fragmented size information. Returning the raw value can mislead userspace. Return -ENODATA instead when the value is unavailable. Signed-off-by: Keoseong Park Reviewed-by: Bart Van Assche Reviewed-by: Peter Wang --- drivers/ufs/core/ufs-sysfs.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/ufs/core/ufs-sysfs.c b/drivers/ufs/core/ufs-sysfs.c index b33f8656edb5..1017dd3ae5d3 100644 --- a/drivers/ufs/core/ufs-sysfs.c +++ b/drivers/ufs/core/ufs-sysfs.c @@ -1847,6 +1847,7 @@ static ssize_t defrag_trigger_store(struct device *de= v, =20 static DEVICE_ATTR_WO(defrag_trigger); =20 +#define UFS_HID_AVAILABLE_SIZE_INVALID 0xFFFFFFFFU static ssize_t fragmented_size_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -1859,6 +1860,9 @@ static ssize_t fragmented_size_show(struct device *de= v, if (ret) return ret; =20 + if (value =3D=3D UFS_HID_AVAILABLE_SIZE_INVALID) + return -ENODATA; + return sysfs_emit(buf, "%u\n", value); } =20 --=20 2.25.1